Suitable for use with most counterclockwise turning small gt 25cc to medium trimmers this aluminium jet fit trimmer head from oregon is very easy to load and even easier to fit supplied with a range of adaptors allowing this unit to be fitted directly to the trimmers blade bolt pre loaded with oregons high performance flexiblade line this jet fit head is ready to go straight out of the box however it can be loaded and with all varieties trimmer line to suit the needs of the use